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                    beginWork
            
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                    mountLazyComponent
            
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                    updateFunctionalComponent
            
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                    updateClassComponent
            
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                    updateHostRoot
            
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                    updateHostComponent
            
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                    updateHostText
            
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                    updateSuspenseComponent
            
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        <li class="chapter " data-level="1.4.7.9" data-path="../flow/begin-work/update-portal-component.html">
            
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                    updatePortalComponent
            
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                    updateForwardRef
            
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                    updateFragment
            
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                    updateMode
            
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                    updateProfiler
            
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                    updateContextProvider
            
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                    updateContextConsumer
            
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                    commit 阶段
            
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                    commitRoot
            
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                    invokeGuardedCallback
            
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        <li class="chapter " data-level="1.5.3" data-path="commitBeforeMutationLifecycles.html">
            
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                    commitBeforeMutationLifecycles
            
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                    commitAllHostEffects
            
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                    commitPlacement
            
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        <li class="chapter " data-level="1.5.4.2" data-path="host-effects/CommitWork.html">
            
                <a href="host-effects/CommitWork.html">
            
                    
                    commitWork
            
                </a>
            

            
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        <li class="chapter " data-level="1.5.4.3" data-path="host-effects/CommitDeletion.html">
            
                <a href="host-effects/CommitDeletion.html">
            
                    
                    commitDeletion
            
                </a>
            

            
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        </li>
    
        <li class="chapter " data-level="1.5.5" data-path="commit-all-lifecycles.html">
            
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                    commitAllLifecycle
            
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                    挂起任务的含义
            
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                    lazy 组件
            
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                                <div class="api-method"><div class="api-method-definition"><h1 id="commitroot">commitRoot</h1><p>&#x9996;&#x5148;&#x8981;&#x6807;&#x8BB0;&#x4F18;&#x5148;&#x7EA7;&#xFF0C;&#x56E0;&#x4E3A;&#x6709;&#x4E00;&#x90E8;&#x5206;&#x4F18;&#x5148;&#x7EA7;&#x7684;&#x4EFB;&#x52A1;&#x5DF2;&#x7ECF;&#x88AB;&#x63D0;&#x4EA4;&#x4E86;&#xFF0C;&#x6240;&#x4EE5;&#x9700;&#x8981;&#x6E05;&#x695A;&#x4E00;&#x4E9B;&#x76F8;&#x5173;&#x7684;&#x4F18;&#x5148;&#x7EA7;&#x3002;&#x88AB;&#x63D0;&#x4EA4;&#x7684;&#x4EFB;&#x52A1;&#x5E94;&#x8BE5;&#x662F;&#xFF1A;</p><ul><li>&#x5B50;&#x6811;&#x4E2D;&#x4F18;&#x5148;&#x7EA7;&#x6700;&#x9AD8;&#x7684;&#x4EFB;&#x52A1;
</li>
<li>&#x6216;&#x8005;&#x5916;&#x90E8;&#x6307;&#x5B9A;&#x7684;&#x4F18;&#x5148;&#x7EA7;&#xFF08;<code>flushSync</code>&#x6216;&#x8005;<code>retry</code>&#xFF09;
</li></ul>
<p>&#x5982;&#x679C;<code>RootFiber</code>&#x672C;&#x8EAB;&#x4E5F;&#x6709;&#x526F;&#x4F5C;&#x7528;&#xFF08;&#x4E00;&#x822C;&#x53EA;&#x6709;&#x7B2C;&#x4E00;&#x6B21;&#xFF09;&#xFF0C;&#x90A3;&#x4E48;&#x4ED6;&#x672C;&#x8EAB;&#x4E5F;&#x8981;&#x52A0;&#x5230;<code>effect</code>&#x94FE;&#x4E0A;&#xFF0C;&#x653E;&#x5728;&#x6700;&#x540E;&#x3002;</p><p>&#x63A5;&#x4E0B;&#x53BB;&#x662F;&#x4E09;&#x4E2A;&#x63D0;&#x4EA4;&#x64CD;&#x4F5C;&#xFF0C;&#x5206;&#x522B;&#x662F;&#xFF1A;</p><ul><li><a href="commitBeforeMutationLifecycles.html">&#x63D0;&#x4EA4;<code>Snapshot</code></a>
</li>
<li><a href="commit-all-host-effecrts.md">&#x63D0;&#x4EA4;<code>HostComponent</code>&#x7684; side effect`</a>
</li>
<li><a href="commit-all-lifecycles.html">&#x63D0;&#x4EA4;&#x6240;&#x6709;&#x7EC4;&#x4EF6;&#x7684;&#x751F;&#x547D;&#x5468;&#x671F;</a>
</li></ul>
<p>&#x6CE8;&#x610F;&#x8FD9;&#x91CC;&#x7528;&#x5230;&#x4E86;&#x4E00;&#x4E2A;&#x65B9;&#x6CD5;<code>invokeGuardedCallback</code>&#xFF0C;&#x53EA;&#x6709;&#x5728;&#x5F00;&#x53D1;&#x73AF;&#x5883;&#x624D;&#x4F1A;&#x4F7F;&#x7528;&#xFF0C;&#x90A3;&#x4E48;&#x4ED6;&#x662F;&#x5E72;&#x561B;&#x7684;&#x5462;&#xFF1F;<a href="invokeGuardedCallback.html">&#x770B;&#x8FD9;&#x91CC;</a></p></div><div class="api-method-code"><div class="api-method-sample" data-lang="js" data-name="JavaScript"><pre><code class="lang-js"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">commitRoot</span>(<span class="hljs-params">root: FiberRoot, finishedWork: Fiber</span>): <span class="hljs-title">void</span> </span>{
  isWorking = <span class="hljs-literal">true</span>
  isCommitting = <span class="hljs-literal">true</span>
  startCommitTimer()

  invariant(
    root.current !== finishedWork,
    <span class="hljs-string">&apos;Cannot commit the same tree as before. This is probably a bug &apos;</span> +
      <span class="hljs-string">&apos;related to the return field. This error is likely caused by a bug &apos;</span> +
      <span class="hljs-string">&apos;in React. Please file an issue.&apos;</span>,
  )
  <span class="hljs-keyword">const</span> committedExpirationTime = root.pendingCommitExpirationTime
  invariant(
    committedExpirationTime !== NoWork,
    <span class="hljs-string">&apos;Cannot commit an incomplete root. This error is likely caused by a &apos;</span> +
      <span class="hljs-string">&apos;bug in React. Please file an issue.&apos;</span>,
  )
  root.pendingCommitExpirationTime = NoWork

  <span class="hljs-keyword">const</span> updateExpirationTimeBeforeCommit = finishedWork.expirationTime
  <span class="hljs-keyword">const</span> childExpirationTimeBeforeCommit = finishedWork.childExpirationTime
  <span class="hljs-keyword">const</span> earliestRemainingTimeBeforeCommit =
    updateExpirationTimeBeforeCommit === NoWork ||
    (childExpirationTimeBeforeCommit !== NoWork &amp;&amp;
      childExpirationTimeBeforeCommit &lt; updateExpirationTimeBeforeCommit)
      ? childExpirationTimeBeforeCommit
      : updateExpirationTimeBeforeCommit
  markCommittedPriorityLevels(root, earliestRemainingTimeBeforeCommit)

  <span class="hljs-keyword">let</span> prevInteractions: <span class="hljs-built_in">Set</span>&lt;Interaction&gt; = (<span class="hljs-literal">null</span>: any)

  <span class="hljs-comment">// Reset this to null before calling lifecycles</span>
  ReactCurrentOwner.current = <span class="hljs-literal">null</span>

  <span class="hljs-keyword">let</span> firstEffect
  <span class="hljs-keyword">if</span> (finishedWork.effectTag &gt; PerformedWork) {
    <span class="hljs-comment">// A fiber&apos;s effect list consists only of its children, not itself. So if</span>
    <span class="hljs-comment">// the root has an effect, we need to add it to the end of the list. The</span>
    <span class="hljs-comment">// resulting list is the set that would belong to the root&apos;s parent, if</span>
    <span class="hljs-comment">// it had one; that is, all the effects in the tree including the root.</span>
    <span class="hljs-keyword">if</span> (finishedWork.lastEffect !== <span class="hljs-literal">null</span>) {
      finishedWork.lastEffect.nextEffect = finishedWork
      firstEffect = finishedWork.firstEffect
    } <span class="hljs-keyword">else</span> {
      firstEffect = finishedWork
    }
  } <span class="hljs-keyword">else</span> {
    <span class="hljs-comment">// There is no effect on the root.</span>
    firstEffect = finishedWork.firstEffect
  }

  prepareForCommit(root.containerInfo)

  <span class="hljs-comment">// Invoke instances of getSnapshotBeforeUpdate before mutation.</span>
  nextEffect = firstEffect
  startCommitSnapshotEffectsTimer()
  <span class="hljs-keyword">while</span> (nextEffect !== <span class="hljs-literal">null</span>) {
    <span class="hljs-keyword">let</span> didError = <span class="hljs-literal">false</span>
    <span class="hljs-keyword">let</span> error
    <span class="hljs-keyword">if</span> (__DEV__) {
      invokeGuardedCallback(<span class="hljs-literal">null</span>, commitBeforeMutationLifecycles, <span class="hljs-literal">null</span>)
      <span class="hljs-keyword">if</span> (hasCaughtError()) {
        didError = <span class="hljs-literal">true</span>
        error = clearCaughtError()
      }
    } <span class="hljs-keyword">else</span> {
      <span class="hljs-keyword">try</span> {
        commitBeforeMutationLifecycles()
      } <span class="hljs-keyword">catch</span> (e) {
        didError = <span class="hljs-literal">true</span>
        error = e
      }
    }
    <span class="hljs-keyword">if</span> (didError) {
      invariant(
        nextEffect !== <span class="hljs-literal">null</span>,
        <span class="hljs-string">&apos;Should have next effect. This error is likely caused by a bug &apos;</span> +
          <span class="hljs-string">&apos;in React. Please file an issue.&apos;</span>,
      )
      captureCommitPhaseError(nextEffect, error)
      <span class="hljs-comment">// Clean-up</span>
      <span class="hljs-keyword">if</span> (nextEffect !== <span class="hljs-literal">null</span>) {
        nextEffect = nextEffect.nextEffect
      }
    }
  }
  stopCommitSnapshotEffectsTimer()

  nextEffect = firstEffect
  startCommitHostEffectsTimer()
  <span class="hljs-keyword">while</span> (nextEffect !== <span class="hljs-literal">null</span>) {
    <span class="hljs-keyword">let</span> didError = <span class="hljs-literal">false</span>
    <span class="hljs-keyword">let</span> error
    <span class="hljs-keyword">if</span> (__DEV__) {
      invokeGuardedCallback(<span class="hljs-literal">null</span>, commitAllHostEffects, <span class="hljs-literal">null</span>)
      <span class="hljs-keyword">if</span> (hasCaughtError()) {
        didError = <span class="hljs-literal">true</span>
        error = clearCaughtError()
      }
    } <span class="hljs-keyword">else</span> {
      <span class="hljs-keyword">try</span> {
        commitAllHostEffects()
      } <span class="hljs-keyword">catch</span> (e) {
        didError = <span class="hljs-literal">true</span>
        error = e
      }
    }
    <span class="hljs-keyword">if</span> (didError) {
      invariant(
        nextEffect !== <span class="hljs-literal">null</span>,
        <span class="hljs-string">&apos;Should have next effect. This error is likely caused by a bug &apos;</span> +
          <span class="hljs-string">&apos;in React. Please file an issue.&apos;</span>,
      )
      captureCommitPhaseError(nextEffect, error)
      <span class="hljs-comment">// Clean-up</span>
      <span class="hljs-keyword">if</span> (nextEffect !== <span class="hljs-literal">null</span>) {
        nextEffect = nextEffect.nextEffect
      }
    }
  }
  stopCommitHostEffectsTimer()

  resetAfterCommit(root.containerInfo)

  root.current = finishedWork

  nextEffect = firstEffect
  startCommitLifeCyclesTimer()
  <span class="hljs-keyword">while</span> (nextEffect !== <span class="hljs-literal">null</span>) {
    <span class="hljs-keyword">let</span> didError = <span class="hljs-literal">false</span>
    <span class="hljs-keyword">let</span> error
    <span class="hljs-keyword">if</span> (__DEV__) {
      invokeGuardedCallback(
        <span class="hljs-literal">null</span>,
        commitAllLifeCycles,
        <span class="hljs-literal">null</span>,
        root,
        committedExpirationTime,
      )
      <span class="hljs-keyword">if</span> (hasCaughtError()) {
        didError = <span class="hljs-literal">true</span>
        error = clearCaughtError()
      }
    } <span class="hljs-keyword">else</span> {
      <span class="hljs-keyword">try</span> {
        commitAllLifeCycles(root, committedExpirationTime)
      } <span class="hljs-keyword">catch</span> (e) {
        didError = <span class="hljs-literal">true</span>
        error = e
      }
    }
    <span class="hljs-keyword">if</span> (didError) {
      invariant(
        nextEffect !== <span class="hljs-literal">null</span>,
        <span class="hljs-string">&apos;Should have next effect. This error is likely caused by a bug &apos;</span> +
          <span class="hljs-string">&apos;in React. Please file an issue.&apos;</span>,
      )
      captureCommitPhaseError(nextEffect, error)
      <span class="hljs-keyword">if</span> (nextEffect !== <span class="hljs-literal">null</span>) {
        nextEffect = nextEffect.nextEffect
      }
    }
  }

  isCommitting = <span class="hljs-literal">false</span>
  isWorking = <span class="hljs-literal">false</span>
  stopCommitLifeCyclesTimer()
  stopCommitTimer()
  onCommitRoot(finishedWork.stateNode)

  <span class="hljs-keyword">const</span> updateExpirationTimeAfterCommit = finishedWork.expirationTime
  <span class="hljs-keyword">const</span> childExpirationTimeAfterCommit = finishedWork.childExpirationTime
  <span class="hljs-keyword">const</span> earliestRemainingTimeAfterCommit =
    updateExpirationTimeAfterCommit === NoWork ||
    (childExpirationTimeAfterCommit !== NoWork &amp;&amp;
      childExpirationTimeAfterCommit &lt; updateExpirationTimeAfterCommit)
      ? childExpirationTimeAfterCommit
      : updateExpirationTimeAfterCommit
  <span class="hljs-keyword">if</span> (earliestRemainingTimeAfterCommit === NoWork) {
    <span class="hljs-comment">// If there&apos;s no remaining work, we can clear the set of already failed</span>
    <span class="hljs-comment">// error boundaries.</span>
    legacyErrorBoundariesThatAlreadyFailed = <span class="hljs-literal">null</span>
  }
  onCommit(root, earliestRemainingTimeAfterCommit)

  <span class="hljs-comment">// profiler &#x76F8;&#x5173;</span>
}</code></pre>
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